content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package hu.akarnokd.reactive4javaflow;
  
  import hu.akarnokd.reactive4javaflow.impl.util.SpscCountDownLatch;
  import org.junit.*;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  
  public class SpscCountDownLatchTest {
  
      @Test(timeout = 5000)
      public void nonblocking() throws Exception {
          SpscCountDownLatch cdl = new SpscCountDownLatch();
  
          assertEquals(1, cdl.getCount());
  
          cdl.countDown();
  
          assertEquals(0, cdl.getCount());
  
          cdl.countDown();
  
          assertEquals(0, cdl.getCount());
  
          cdl.await();
      }
  
      @Test(timeout = 1000)
      public void interrupted() throws Exception {
          SpscCountDownLatch cdl = new SpscCountDownLatch();
  
          Thread.currentThread().interrupt();
  
          try {
              cdl.await();
              fail("Did not throw?!");
          } catch (InterruptedException expected) {
              // expected
          }
      }
  
      @Test(timeout = 10000)
      @Ignore("Fails with timeout for some reason.")
      public void async() {
          for (int i = 0; i < 1_000_000; i++) {
              SpscCountDownLatch cdl = new SpscCountDownLatch();
  
              Runnable r1 = () -> {
                  try {
                      cdl.await();
                  } catch (InterruptedException ex) {
                      throw new RuntimeException(ex);
                  }
              };
  
              Runnable r2 = cdl::countDown;
  
              TestHelper.race(r1, r2);
          }
      }
  }
  